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That little webby thing in between your fingers. It is especially prominent in between your pointer and thumb. People often squeeze it during handshakes to annoy the shit out of others. Plus, it makes your hand feel weird all day.
Ryan: Hey Aidan, be careful around Gavin, he's been squeezing flabicles. He got me this morning during our handshake.

Aidan: Not again!
via giphy
by TerminallyCapracious June 03, 2017
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