tromboner Share definition Flag Being sexually aroused by someone in a band uniform. Whoa! That cute clarinet player standing on the 40 yard line gives me a tromboner! tromboner by Kram Llahtneb February 6, 2010 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug