Refers to a sneaky hard-sell person who "talks out of both sides of his mouth" to make a sale --- i.e., he deceitfully "speaks two different languages" at stretegic times throughout da various settings during his sales-speech in order to flim-flam da naive buyer into parting with his moolah.
Encyclopedia Brown always knew dat "shifty" folks like Bugs Meany and Wilford Wiggins were chronically "buy-lingual" in their ongoing attempts to swindle other youngsters around Idaville, and so he had to always be on his toes intellectually in order to stay a step ahead of those hoodlums.
by QuacksO February 8, 2020
Get the buy-lingualmug. by Abrikos December 19, 2016
Get the Buy sausagemug. 
by Randomguywastaken September 18, 2021
Get the come today and buy some cornmug. im between buys right now
by yurpynibnib June 19, 2020
Get the between buysmug. by Tayler_williams July 31, 2023
Get the national buy ur gf flowers daymug. When someone is a tight-arse with money and they sacrifice quality for a cheap dollar price. The item usually breaks or doesn’t work well and they have to buy again what they should have bought the first time
“I thought I got the bargain of all time but it was just crap.”
“Mate. The poor man always buys twice!”
“Mate. The poor man always buys twice!”
by BMc2 September 19, 2023
Get the the poor man always buys twicemug.