Wiktionary
vb. (context intransitive of a drink English) To be easily imbibed; to be easy to drink.
Usage examples of "slip down".
She squirmed around and started to slip down into the wreckage with Ferguson.
I suppose you have shown it in the kitchen, and instead of my being able to slip down to the bridge to-night quietly, and see who is there, the whole household will be going in a procession.
I slip down so that my head isn't cold, pull up my knees and wrap my arms around myself.
At once he saw his danger: if he fell into the water he would slip down to the lowest part of the magical globe and be crushed between the ship and the bottom of the bubble.
Jebediah, his eyes as wide as they would go, raised one hesitant hand to a temple and then let it slip down his cheek and fall weakly to his lap.
I'd slip down there, I thought, find that box canyon, find the gold if I could, and then round up Penelope and the others and get the girl out of trouble.