What is jac blaster in gay sex?

What is jac blaster?

Common slang term for poppers, or amyl-nitrate, that one snorts, that creates a head rush, while also relaxing the muscles.

Definition

Common slang term for poppers, or amyl nitrate, that one snorts, that creates a head rush, while also relaxing the muscles, most notably the sphincter muscles, momentarily.

Popular in the gay community, though mostly illegal in many countries.

It had an effect of allowing the muscles to relax, and was used among many bottoms, while being penetrated, to allow the penis to enter less painfully.