When a guy takes a shit in another guys mouth. Usually performed by homosexual males but others can perform this sexual act too.
Jake: "Yeah honestly I was surprised when Chad asked me to give him a boom boom but I am down for anything."
Jeff: "That's GNARLY man!!!"
Jeff: "That's GNARLY man!!!"
by beefysteak July 10, 2020
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Get the Boom Boom mug.A man I think the world of, Budroe, will always remember holding his son during storms. Picture how cute it is to hear “boom boom pow pow” from your best buddy.
by BB29576 October 10, 2022
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