When you like someone or something to a point, but after a little while it starts to get on your nerves and continued exposure makes you feel like biting a steel rod in two.
The quantity of a mind-altering substance which does not impair the user's ability to functionally converse. This dosage can a be highly (no pun intended) subjective, depending not only upon the substance and the user, but also the peripheralcircumstances.
When David Hasselhoff's cheeseburger starts falling apart, that's a sure sign that Mr. Hasselhoff has surpassed his social dose of alcohol for the evening.
You might THINK you're on a social dose of david lee roth, but you are acting like an overbearing coked-up bastard.
The girls didn't know much about mixing alcohol with pills, so their 'social dose' of Xanax and Smirnoff Ice led to blackouts and xanaps.