To hype someone up with praise and encouragement — usually before an event, date, interview, or bold move. "Gassed her up for 20 minutes" = talked her into the confidence she needed. The friend who gasses you up is not optional; they are infrastructure.
"She needed confidence before the interview. I gassed her up for 20 minutes."
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To 'gas someone up' means to hype them up, build their confidence, lavish them with praise — usually genuinely supportive, occasionally excessive. 'My friends always gas me up before a date' = 'my friends always boost my confidence'. If your teen 'gasses up' a friend, they are being a good cheerleader. Wholesome friendship vocabulary; only worth attention in the rare context of excessive flattery for manipulative ends.
Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.
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