(idiomatic) to burn one's bridges

(idiomatic) to commit something to memory

(colloquial, idiomatic) to be a crafty, sly devil/fox, to be a sly dog, to be sly as a fox (be crafty, sly, or occasionally impish and punchy in spite of one’s harmless, innocent, naive appearance) (of people; more rarely, of animals) / (colloquial, idiomatic, figuratively) not to be as harmless, innocent, naive as it may seem at first glance; not to be underestimated (of things and abstract notions)

(idiomatic, colloquial) to knock back a drink

malicious, insidious, sneaky / common, low, vulgar, mean

backwards / from behind / secretly, insidiously, stealthily

back, rear end (the part of something that goes last)

hinterland; areas surrounding and serving an economic centre, especially when located away from the main direction of travel and commerce / hinterland; remote areas, backwater / hinterland; areas lying beyond some given line or point, such as a river or mountain / hinterland; rear (areas away from the front)

behind the, to the rear of the

(idiomatic, informal) pull the wool over somebody's eyes