No, if the magnitude of the force of friction becomes larger than the weight of the person, the person cannot slide up.
Friction is a force that opposes the relative motion between two surfaces in contact. In the context of a person standing on a horizontal surface, the force of friction acts in the opposite direction to the motion or intended motion of the person. Its magnitude depends on various factors, such as the nature of the surfaces in contact, the normal force (which is equal to the weight of the person in this case), and the coefficient of friction.
When the force of friction becomes larger than the weight of the person, it means that the maximum frictional force has been reached or exceeded. This is known as the limiting friction or the maximum static friction.
In this scenario, the person would not be able to slide up because the frictional force, even at its maximum, is still acting in the opposite direction to the intended motion (upward in this case). The person would experience a net force in the downward direction (weight minus friction), making it impossible for them to move upward against gravity.
To slide up, the applied force or the force pushing the person upward would need to exceed the force of friction. This can be achieved, for example, by applying an external force greater than the maximum frictional force or by reducing the frictional force through the use of lubricants or reducing the contact between the surfaces.