List slang to avoid with teachers or in formal settings
In formal settings or when speaking with teachers, slang and casual expressions should generally be avoided because they can sound unprofessional, vague, or overly familiar. Clear standard language is the safest choice in class discussions, presentations, emails, interviews, and other situations where accuracy and respect matter.
Common slang and informal words to avoid
- Words and contractions like “gonna” (going to), “wanna” (want to), “got” (have), “cuz” or “bcos” (because), “kinda” or “sorta” (somewhat)
- Casual affirmatives and negatives: “yup,” “yeah,” “nope” instead use “yes,” “correct,” “no,” or “negative”
- Informal fillers and sentence starters: “like,” “you know,” “basically,” “ermmm,” “no,” “say,” “you see”
- Overused slang adjectives or expressions: “cool,” “awesome,” “dope,” “chill,” “freakin’,” “crazy,” “cringe”
- Casual or vague words: “stuff,” “thing,” “guys” (use more specific and respectful alternatives like “colleagues” or “team”)
- Internet acronyms and informal exclamations like “LOL,” “OMG,” “no cap,” “lit,” or “slay” which are not appropriate in formal communications
- Informal phrases expressing emotion or state of being, e.g. “I’m swamped” (overwhelmed) or “freaked out” (worried), better replaced with more professional terms
Schools or professional environments may explicitly ban the use of slang in formal communications like presentations, essays, emails, or job interviews to ensure clarity, respect, and professionalism. 1, 2, 4, 6, 9
Why these words sound inappropriate
Most of the expressions above are not wrong in everyday conversation, but they can weaken the tone of a formal exchange. A teacher may still understand “yeah” or “gonna,” yet those forms often sound rushed, overly casual, or careless when compared with standard alternatives.
Vague words such as “stuff” and “thing” can also make ideas harder to follow. In formal speech, specificity usually sounds more competent: “materials,” “documents,” “assignment,” “project,” or “topic” communicates more clearly than a general placeholder.
Internet slang creates another problem because it can age quickly and vary by community. A phrase that sounds normal in a chat app may feel out of place in an academic setting, especially when the goal is to show careful language control.
Better replacements in formal speech
A useful rule is to replace slang with complete, precise expressions.
- “I’m gonna submit it tomorrow” → “I am going to submit it tomorrow”
- “Yeah, I did the homework” → “Yes, I completed the homework”
- “I’m swamped this week” → “I have a very heavy workload this week”
- “That presentation was awesome” → “That presentation was excellent”
- “I need some stuff from the office” → “I need some materials from the office”
Using full forms and exact nouns makes spoken language easier to trust. In many classroom and workplace situations, that small shift creates a more professional impression immediately.
Practical rule for learners
If a phrase would sound natural in a group chat, it may still be too informal for a teacher, examiner, or manager. When in doubt, choose the clearer, more neutral version. Active conversation practice helps make that switch automatic, because formal and informal registers become easier to recognize in real time.
When slang may be acceptable
Not every interaction with a teacher or authority figure must sound stiff. In a relaxed conversation after class, some mild informal language may be fine if the relationship is friendly and the setting is clearly casual. The key distinction is context: a public presentation, graded assignment, office email, or interview calls for more careful wording than a quick hallway exchange.
Quick checklist for formal situations
- Use full words instead of contractions when possible
- Choose “yes” and “no” over casual affirmatives like “yeah” and “nope”
- Avoid fillers that weaken clarity
- Replace vague nouns with specific terms
- Skip internet slang, acronyms, and exaggerated expressions
- Keep emotion words professional and precise
If uncertain, clear, complete, and formal language is the best practice in educational and professional settings.