In fighting games:

The act of performing a move that fails to connect with the opponent, whether it be on hit or on block.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

originally from the game of whiffle ball, specifically the sound the hollow plastic bat makes when one swings hard and misses the ball.
Also, it means to fail badly at a very simple task. This is a big put down.

A quick smell of something that doesn't usually smell very nice.

To swing and miss in the game of baseball.
Often used to describe a player who swings and misses by a considerably margin and frequently.

An English word used informally with unpleasant, foul smells, often used as a synonym for sniff, scent, odour and aroma.

Etymology: The word became popular in the 16th century with tobacco smoking, probably influenced by whiffle "blow in gusts or puffs".

A slang word for Cocaine