Bitis Polypheme: Probability to roll 10 snake eyes in a row (~2.7*10^-16) [(1/36)^10]
Bitis Unipheme: Bitis Polypheme^-1=36^10
Googolgex: 10^100 in a 10^100-gon (~5*10^299) [10^100*((10^100)^2-3*10^100+4)/2]
Googolhypergex: 10^100 in a 10^100-dimensional triangle (~10^10^99.63) [((10^100)^10^100)/((10^100)!)]
Googolthrine: 10^100^1000
Googolquine: 10^100^1000^10000
Googolpine: 10^100^10000^100000
Yesno: 10^^10^(10*(10+10))=10^^10^200
Duper K: 10{4}4
Hyper K: 10{4}5
Ultra K: 10{4}10{3}10
Lesse Potens: L(((L((L(10))))))
Messier: 2{3{4{5{6}7}8}9}10
Graham's Participation Trophy: g63
Frankenstein's Moser: f(2[5]) where
f(1)=2[5]
f(n)=2[f(n-1)]
Tiss Orbilesk: {3,{3,3},{3,3,3},{3,3,3,3},{3,3,3,3,3}}
Isthmus: g_{SVO}(100)
On Sumara: 10{X^X+1}10{X^X}10
Thhrez: {3,3,3(3)3,3,3}={3,3(3)(1)2}
Sixth Period: 6^6#^#^#^##6
Oodle: {5,6[1/2]2}
ⴰⵔⵜⴻⵔⵢ: Worm(42)
Oodler: {5,6[1/1[1/2]2]2}
Oodlest: {5,6[1/1/2]2}
Callzen: E40#^^^#^^#^##90
ᠪᠤᠷᠨᠡᠷ: 44![4(1)4]w/[1]
ⵅⴻⵛⵀⴰⵙⵎⴻⵏoⵙ: BH(42)
???: {3,3,3(1)2}
...: {3,3(1)3,3}
$$$: {3,3,3(1)(1)(1)3}