synaloepha
A sex act in a threesome where two individuals orally stimulate either side of a man's penis at the same time.
Jerome: How was the threesome last night?
Nikko: It was great! Hannah and Keegan were sucking on either side of my wang! It was crazy!
Jerome: Dude! You achieved a synaloepha!
Nikko: It was great! Hannah and Keegan were sucking on either side of my wang! It was crazy!
Jerome: Dude! You achieved a synaloepha!