Words that don’t exist but ought to, proposed by Gelett Burgess in Burgess Unabridged (1914):

cowcat: an unimportant guest, an insignificant personality
critch: to array oneself in uncomfortable splendor
edicle: one who is educated beyond his intellect, a pedant
fidgeltick: food that is a bore to eat
flooijab: an apparent compliment with a concealed sting
gloogo: foolishly faithful without reward
gorgule: a splendiferous, over-ornate object or gift
gowyop: a perplexity wherein familiar things seem strange
jip: a dangerous subject of conversation
lallify: to prolong a story tiresomely, or repeat a joke
leolump: an interrupter of conversations
oofle: a person whose name one cannot remember
paloodle: to give unnecessary advice
pooje: a regrettable discovery
spillix: accidental good luck
tashivation: the art of answering without listening to questions
uglet: an unpleasant duty too long postponed
vorge: voluntary suffering, unnecessary effort or exercise
xenogore: an interloper who keeps one from interesting things
yamnoy: a bulky, unmanageable object to be carried
yowf: one whose importance exceeds his merit

Interestingly, we owe the word blurb to Burgess — he invented it in 1906 for his book Are You a Bromide?, and it proved so useful that we’re still using it more than a century later.