S-character of a hybrid orbital

[Jessica Yen Dis2G]

What does it mean when "the s-character of a hybrid orbital is increased"? Why does the bond angle between two hybrid orbitals increases as the s-character of the hybrids is increased?

[Angela He 3B]

s character basically refers to the s in the hybrid orbital, so for example sp3 would be 25% s character and 75% p character. The bond angle would increase when the s character increases because there is a decrease in the p character, which would mean less electron densities around the central atom. For example a sp hybrid would have bond angles of 180 degrees. An sp2 hybrid, with a decreased s character, would have bond angles of 120.

[Arielle Kunitz 3A]

I think of it like the ratio of S to other hybrid orbitals (P and/or D)
SP hybridization has a 1:1 ratio
SP2 has a 1:2 ratio
SP3D2 has a 1:5 ratio

The 1:1 SP will have the most S-character
This yield as larger bond angle (180 degrees, linear in shape) than, let's say, SP3D2 (90 degrees, octahedral in shape)

Hope this helps :)