The condition of being so exhausted to the point of being incoherent and incomprehensible in one's conversations.
The term is a combination of the words sleepy and drunk.
Girl: I woke up at 6:45 a.m. with my phone in my hand. I was so tired when I was on the phone when I was talking to you last night! I hope I didn't say anything inappropriate!
The large accumulation of ice and snow that builds up in the wheel wells of your vehicle while driving on roads that are not cleaned of snow.
Also the sound the lump makes when kicked off the car.