A boyfriend who lies, is sneaky, hides things or just takes part in shady boyfriend things. ex- getting drunk or going out without your girlfriend
Ryan got drunk and hit on every girl there, but he's a shady boyfriend so he won't tell Kayla.
puts his phone on silent, has lots of friends that are "girls" but has never cheated.
I am a good guy i would never cheat, im just a shady boyfriend.