choke a lime

this guy tried to order a weird drink over the insanely loud music. he said, "myers, tonic, double, choke a lime." so first of all, myers and tonic is pretty nasty, but to each his own. fine, i'll make it for him. double shot? fine. choke a lime? wtf? i'm not a fruit murderer. over the loud music i thought he said "SoCo lime." so i kept trying to ask him if he wanted a separate shot and he kept saying no. so after the whole awkward shennanigan (in which he didn't stop saying "choke a lime".. he could have just said 'give me a damn lime') i just gave him the drink with a lime and he 'choked' the lime himself. i guess i'm not cool enough to know what 'choke a lime' meant.