blow sunshine up (one's) ass

rude slang To speak in a deceptively or deceitfully positive manner to one, usually in an attempt to hide the truth of a situation or someone's feelings. I think they're blowing sunshine up our asses about the financial situation. I have a feeling that things are actually much worse than they're letting on. Did my singing sound good? Come on, be honest—don't just blow sunshine up my ass. Dude, I really think you could win this contest, and I'm not blowing sunshine up your ass.