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The act of putting a thermos flask under your kilt, removing the lid to steam and warm up the male genitalia.

Often used in the scottish highlands
Hamish: It's unbelievably cold today

Colin: Aye, it certainly is...it's time for a thermos dip me thinks
by satanicbean April 15, 2009

Words related to thermos dip

bollocks flask heat male thermos