tip the scale(s) see under tip²

tip² /tip/

1. To throw down
2. To upset or overturn
3. To tilt
4. To shoot, dump, empty (out) by tilting
5. To toss (off)

1. To topple (over)
2. To tilt

1. A tilt
2. A place for tipping rubbish, coal, etc
3. A dump
4. An extremely untidy place (informal)
5. A staithe or shoot
6. A tram for speedy transference of coal

tippˈable adjective

tippˈer noun

1. A person or thing that tips
2. A lorry or truck, the body of which can be tipped up for unloading (also adjective)

tippˈing noun

tippˈy adjective

Inclined or likely to tip, eg because of being top-heavy

tipˈ-cart noun

A cart emptied by being tilted up

tipˈcat noun

1. A short piece of wood that is pointed at both ends
2. A game in which the cat is struck with a cat-stick and made to flip up

tipˈ-cheese noun (Dickens)

Appar, tipcat

tipping point noun

The point in a process at which an irreversible momentum is reached

tipˈ-up adjective

Constructed so as to be able to be tilted

tip (it) down

To rain heavily

tip off liquor

To turn up the glass, bottle, etc until quite empty

tip one's hat

To raise, tilt or touch the brim of one's hat as a polite greeting

tip the balance or tip the scale (or scales)

1. To make something more, or less, favourable to someone
2. To be the deciding factor in a result

tip the scale or scales

1. To depress one end of the scales
2. To weigh (with at)