1) Cast aspersions on 2) Dropped words 3) Like drink-affected speech 4) Not enunciated 5) Sang notes without a break 6) Shpoken thish way 7) Slipped over 8) Sounded drunk 9) Talked like a tippler 10) Thick 11) Unintelligible 1) Unintelligible 
• (a.) Marked with a slur; performed in a smooth, gliding style, like notes marked with a slur. • (imp. & p. p.) of Slur
Slurred adjective (Mus.) Marked with a slur; performed in a smooth, gliding style, like notes marked with a slur. 
[adj] - spoken as if with a thick tongue
thick adjective spoken as if with a thick tongue; `the thick speech of a drunkard`; `his words were slurred`