Green’s Dictionary of Slang

(US black) a phr. of greeting or enquiry.

1997		Busta Rhymes ‘"Put Your Hands Where My Eyes Could See’ 🎵 Silly with my nine milli, what the dealio?
1997–2001		Online Sl. Dict. 🌐 what’s the dilly? 1. a greeting. Note: also ‘what’s the dills.’ (‘Hey, what’s the dilly?’).
1998		Total ‘What The Dealio’ 🎵 Oh, what the dealio, can I speak to you.
1998		DMX ‘Let Me Fly’ 🎵 So what the dilly? What it was worth?
1998		Eble Campus Sl. Apr. 10: what the dilly yo? – greeting. what’s the dilly? – request for information: ‘What’s the dilly with the concert?’.
1999		Black Moon ‘Freestyle’ 🎵 What the dilly, yo? I’m in it for the women and the profit.
2000		Ebonics Primer at www.dolemite.com 🌐 dilly Definition: ‘What is happening?’ Example: Whats the dilly, yo.
2000		Three 6 Mafia ‘D-Suckin’-H’ 🎵 Nigga, what’s the dilly.
2002		‘Touré’ Portable Promised Land (ms.) 158: We Words (My Favorite Things) [...] Whatdedeal? What’s goin on? What’s the dilly-o?
2002		Nature ‘What You Know’ 🎵 What’s the dealy with the ladies that be doin’ it right.
2009		Meek Mill ‘Brush Em Off’ 🎵 Meek Milly, what da dealy, how you feelin?
2009		Royce Da 5’9 ‘Street Hop 2010’ 🎵 I live by the bust’ scenario, what the deallio?
2012		Gangrene ‘Due Work’ 🎵 With me and my crew, work is never done, what the dealy, Gangrene?