Insect Socks
Description: You just can't get enough of those cute little bugs and beetles jumping around? This funny design makes a great gift for insect, butterfly, grasshopper, dragonfly and bumblebee fans. Insects all over the place: Whether bee, hornet, moth, mosquito, bug, beetle or grasshopper, this biodiverse bug showcase cabinet has got them all, even the vampire and the tyrannosaurus!
Description: Show off your pest-busting expertise with this “Pest Warfare Specialist” design, featuring a pro in full gear spraying a house to keep critters at bay. Perfect for exterminators, pest control technicians, and anyone proud of maintaining a bug-free home, this tee celebrates the heroes of home protection.
Description: Given the context behind this scene (Bilbo getting cocky and snubbing Smaug, only to be nearly burned in the process), I'd interpreted the expression as meaning "don't get too cocky / overconfident, no matter how well you're doing, or it'll backfire on you" or something along those lines