33. spewing
34. being sick
35. making pavement pizza

???wondering if hoiking is what I mean -I think that's what we used to call it in Northumberland.....

I think I'm all done, I may need to start inventing some......

Translated from French : feeding the fish (when you're sailing)

36) reverse peristalsis

37) Egestion (Thank you crossword puzzles)

38) Bleurgh (comic strip onomotopoeia)

I was on a drift fishing boat once, and people getting seasick were said to be chumming.

So,
39.) chumming

40) shouting at your shoes

41) pebbledashing the pavement (you don't see much pebble-dashing over here....)

42) Feeding the Dog

Couple more
 

43. Doing the corn dance
44. Showing your dinner
45. Eating in reverse
46. Making leftover chowder
47. Storing your leftovers
48. Saving some in your beard for later
49. Performing in the pre-made parade

50. Crying over spilt milk

Making a peacock (literal translation from Polish)
Vomiting against your flat hand...

51. Stating a political opinion

52. Verrückt waterslide