A-Shake

Noun An awkward handshake.

A convenient expression used to admit to a misinterpreted social interaction involving physical contact in order to see the irony in it and in most cases make a better (more symbiotic and mutually prepared) handshake

Could be used in other social interactions such as:
Fist-bumps
High-fives

Pewdiepie and mr. Septiceye meets on the supermarket and says hello to each other. Pewds is going in for the "up top" and mr. Septiceye is greeting him with a fist-bump. An akward moment arises as they both freeze and begin to realise what situation they are in.

Pewds says: "holy sh*t that A-shake though" - and laughs.

Mr. Septiceye responds with a laugh and says: "Yeah bro, totally. Come here" - and they both go in for the hug. An extremely awkward situation got averted because pewds had done his research into awkward handshakes and could respond to the situation in the best way possible.