Poke (ポケ,Poke?) comes from Poketto (ポケット,Poketto?), the Japanese way of pronouncing the word "pocket".
Strengths and Weaknesses
The main strength of this fruit is that it allows the user to store various things inside pockets in their body. The objects stored inside can be much larger than the opening of the pocket, as they change size accordingly. It is stated that the user can have infinite pockets in their person, effectively giving them limitless storage capacity.
No weaknesses are currently known outside the standard Devil Fruit weaknesses.
Blamenco has been shown to use this ability to store a giant hammer inside his right chin pocket.
This fruit's power, and possibly first usage, is a reference to Hammerspace.
According to Oda, Usopp would have this Devil Fruit if he was allowed one.