Side boom 

When your in complete aggreement with close friends, with high level of excitment.

Bro #1. We should plan another riding trip with Mr. WILSON.
Bro #2 Side boom...HELL YEAH !!

Side boom by Leddie June 21, 2020

side boom 

A woman's cleavage that you notice from the side. Usually luscious and large in size.

Guy1: Whoa!! Look at that side boom.
Guy2: Holy mother!

side boom by ChristianB April 23, 2007

boombastic side eye 

used when someone keeps asking dumb questions and requires an equally dumb response back.

can also be used as an alternative to the word 'No' and other words similar to no

Soapia: "are you going to cheat on me?"

You: "boombastic side eye.. of course not"

boombastic side eye by Chupapimun June 27, 2023

Sideboom 

A piece of heavy equipment operated by a cocky lazy union operator to lay steel pipe in oilfield

I operate a PL87 sideboom because I’m a boom hand from the promise land

Sideboom by Dieseltech23 May 8, 2019