Urban Dictionary

A spontaneous and usually random time where someone checks your vibe. A vibe check should usually be a pleasant experience where the person being checked is vibin.

The typical onomatopoeic reaction of boys when they unexpectedly run into the prettiest girl in school. The term originates from the manga/anime "Saiki Kusuo no Psi-nan" , where all the male characters (except Kusuo) would go "Ouf!" when face to face with female character Teruhashi Kokomi.

To take a conspicuous but essentially useless action ostensibly to support a good cause but actually to show off how much more moral you are than everybody else.

People who join a gym after the New Year, only to quit going within 3 months.

The phrase hedgehog's dilemma refers to the notion that:

(1) The closer two beings come to one another in a relationship, the more likely it might be for them to inflict psychological pain on each other
(2) Yet if they remain apart, they each might feel the roughly-equivalent (psychological) pain of loneliness.

This notion comes from the conjecture that hedgehogs, with sharp spines on their backs, might hurt each other if they get too close. It is a character trait believed to be possessed by some individuals, in real life as well as in works of fiction, sometimes causing anti-social behaviours, often allegedly caused by an unpleasant past experience of intimate relationships. A person who suffers from the hedgehog's dilemma will usually avoid becoming too close or involved with someone, due to fear of another similar, possibly painful, experience, such as they had experienced in the past.

It’s clipped means that the situation being described is completely hopeless. it’s done, over, clipped.

An expression of shock, surprise or disgust. Derived from the word yikes It is the gen y way of expressing yikes