The act of male on male scissoring. The men spread their legs in a "Y" (scissor) shape and place scrotum's together, usually behind the other party's testicular sac, and proceed to pleasure one another.
Man, my sac hurts! Next time we squanch, one of us needs to shave so it's not like our balls are Velcroed together..
The word squanch has a similar meaning to words like: whammed, hench and dench. However, if you are squanch you are also quite likely to be aggressive or on piss/violence. It will often be used as a compliment amongst the mandem.
"Oi, you ain't even squanch blud"
"Nah I heard he on gang, swear he bare squanch aswell"
"My YG is squanch bare man saying he on piss still"