Top definition
Changing rules/equipment to benefit ones situation. Specifically used in CrossFit but can used universally to gain advantage.

See also, Xebex.
I ran out of condoms so opex'd a baggy and banged all night.
by KickasstanedaP May 09, 2018
Get the mug
Get a Opex mug for your barber James.
buy the domain for your cat vlog