A quick thing that I think I'll have a better artist than me render nicely. X3
So Leslie kept pestering a fair-sized slime to stuff itself into her for a little while, and it got fed up with her asking, so it had its big brother teach her a lesson.
Slime: "Now, I can stop at any time and let you go. Just say the word!"
Leslie: "...! ...!!"
Slime: "All right then! I have another dozen tons for you!"
"Mmff mmff!" is great and all, but complete inability to make any sound is even better!
Slime: "Now, I can't provide you as much oxygen as you usually get, but it's enough to keep you alive. You're likely to pass out if you struggle too much though."
Leslie: squirms weakly and eyes cross
I'm so mean to her. <3