let it cum 

"let it come" is what other guys shout when you say "I'm gonna cum" while another dude is sucking your dick.

Matt said "I'm gonna cum" before he blew his load into my mouth -- and another dude shouted "let it cum" !

let it cum by USAF Cadet July 9, 2021

Let it out -- cum ! 

"Let it out -- cum !" is what the guy who is jacking you off says to you when he knows you're getting close to blowing your load.

Matt was jacking me off, and when he said "Let it out -- cum !" -- I shot my load everywhere - it hit my face!

Let it out -- cum ! by USAF Cadet July 17, 2021